CN1820095A - Yarn for artificial turf ground cover, artificial turf ground cover and playing field including such a yarn and method for producing it - Google Patents

Yarn for artificial turf ground cover, artificial turf ground cover and playing field including such a yarn and method for producing it Download PDF

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Publication number
CN1820095A
CN1820095A CNA038268604A CN03826860A CN1820095A CN 1820095 A CN1820095 A CN 1820095A CN A038268604 A CNA038268604 A CN A038268604A CN 03826860 A CN03826860 A CN 03826860A CN 1820095 A CN1820095 A CN 1820095A
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CN
China
Prior art keywords
silk thread
layer
core layer
strand
ground cover
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Pending
Application number
CNA038268604A
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Chinese (zh)
Inventor
弗兰克·阿茨马
迪克·维尔德许特
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Lankhorst Indutech BV
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Lankhorst Indutech BV
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Publication of CN1820095A publication Critical patent/CN1820095A/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/42—Formation of filaments, threads, or the like by cutting films into narrow ribbons or filaments or by fibrillation of films or filaments
    • D01D5/426—Formation of filaments, threads, or the like by cutting films into narrow ribbons or filaments or by fibrillation of films or filaments by cutting films
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30—Conjugate filaments; Spinnerette packs therefor
    • D01D5/32—Side-by-side structure; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/04—Pigments
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/06—Dyes
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/34—Yarns or threads having slubs, knops, spirals, loops, tufts, or other irregular or decorative effects, i.e. effect yarns
    • D02G3/346—Yarns or threads having slubs, knops, spirals, loops, tufts, or other irregular or decorative effects, i.e. effect yarns with coloured effects, i.e. by differential dyeing process
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
    • D02G3/445—Yarns or threads for use in floor fabrics
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N7/00—Flexible sheet materials not otherwise provided for, e.g. textile threads, filaments, yarns or tow, glued on macromolecular material
    • D06N7/0063—Floor covering on textile basis comprising a fibrous top layer being coated at the back with at least one polymer layer, e.g. carpets, rugs, synthetic turf
    • D06N7/0065—Floor covering on textile basis comprising a fibrous top layer being coated at the back with at least one polymer layer, e.g. carpets, rugs, synthetic turf characterised by the pile
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C13/00—Pavings or foundations specially adapted for playgrounds or sports grounds; Drainage, irrigation or heating of sports grounds
    • E01C13/08—Surfaces simulating grass ; Grass-grown sports grounds
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2201/00—Chemical constitution of the fibres, threads or yarns
    • D06N2201/02—Synthetic macromolecular fibres
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2201/00—Chemical constitution of the fibres, threads or yarns
    • D06N2201/02—Synthetic macromolecular fibres
    • D06N2201/0254—Polyolefin fibres
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2201/00—Chemical constitution of the fibres, threads or yarns
    • D06N2201/10—Conjugate fibres, e.g. core-sheath, side-by-side
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2201/00—Chemical constitution of the fibres, threads or yarns
    • D06N2201/12—Fibres being in the form of a tape, strip or ribbon
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2505/00—Industrial
    • D10B2505/20—Industrial for civil engineering, e.g. geotextiles
    • D10B2505/202—Artificial grass
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/23907—Pile or nap type surface or component
    • Y10T428/23957—Particular shape or structure of pile
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/23907—Pile or nap type surface or component
    • Y10T428/23993—Composition of pile or adhesive
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2929—Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2929—Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]
    • Y10T428/2931—Fibers or filaments nonconcentric [e.g., side-by-side or eccentric, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2973—Particular cross section
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2973—Particular cross section
    • Y10T428/2976—Longitudinally varying
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2973—Particular cross section
    • Y10T428/2978—Surface characteristic

Abstract

A yarn for strands of an artificial turf ground cover, including a tape filament (4) having a core layer (8) and two outer layers (9) of a different material than the core layer (8), each on one of two opposite sides of the core layer. The core layer (8) contains at least polyester or polyolefin material, and the outer layers (9) contain high-density polyethylene. An artificial turf ground cover and a playing field including such a yarn and a method for producing such a yarn are also described. The high-density polyethylene has a relatively small coefficient of friction with the human skin and the yarn has a good shape recovery after deformation in spite of containing HDPE in outer layers.

Description

The method that is used for the silk thread of artificial grass ground cover, the artificial grass ground cover that comprises this silk thread and sports ground and is used to produce this silk thread
Technical field
The present invention relates to a kind of silk thread that is used for the artificial grass ground cover, relate to a kind of artificial grass ground cover that comprises this silk thread, and relate to a kind of sports ground that comprises this silk thread, and relate to a kind of method that is used to produce this silk thread.
Background technology
Artificial grass---is also referred to as artificial pasture or artificial lawn sports ground---and is provided as blanket shape ground cover usually, and this ground cover has more or less upright individual filament or the multifilament strands that is fixed on the underboarding and protrudes upward from underboarding usually.Strand can be formed by the thin and flat silk thread of plastic material.Strand can be assembled cluster, and this bunch is fixed on the underboarding.Underboarding has fabric or fabric like structure usually and is also made by plastic material usually.
This ground cover covers ground usually to form sports ground and common alternative with oppose nature turf ground cover or other traditional sports ground surface, the resistance that use high strength on nature turf ground cover or traditional sports ground surface is relatively poor, needs more maintenance and forms so uneven and more uneven surface usually.
Can provide cushioning effect placing elastic pad below the blanket and above the hard ground support surface.And also be to be known that on underboarding and to use granular filler to promote the upright position of strand round strand.An example of this artificial grass ground cover is described in International Patent Application WO 98/56993.
The strand of this artificial grass formula ground cover must satisfy several requirements.A requirement is that elastic force is arranged, promptly strand for example passive movement person's pin must be able to rebound after flattening close proximity to ground, and strand should be able to promptly and repeatedly rebound.And especially for playing soccer, strand should be enough hard, thereby make ball and substrate layer top thereon, position spaced apart fully.In order to satisfy these requirements, strand is made by the elastomeric material of flexibility usually, and these materials also can recover its original shape, for example polypropylene, linear low density polyethylene or polypropylene and poly block copolymer after bigger distortion.Another requirement is that strand will have good durability.Specifically, strand should not too easy fibrillation.The another one requirement is that the coefficient of friction between strand and the human body skin can not be too big, in order to avoid the skin calcination takes place when human body skin slips over turf.Especially for the characteristic of back, still thereby expectation can have to improve and makes the artificial grass can be as the attractive alternative of the used natural turf of contest or other purpose, child's sports ground for example, it can relate to or may relate to skin-turf contact, for example football of frequent slip.
In european patent application 0 259 940, proposed to have the artificial grass of lower coefficient of friction than the turf that comprises polypropylene strands.Wherein described to polypropylene and added polyethylene terephthalate, perhaps made the strand of turf of (co-extruded) sandwich tape of combination of extrusion, this strand comprises the polyacrylic internal layer between the exterior layer of linear low density polyethylene.Linear low density polyethylene has the coefficient of friction lower than polypropylene, and itself is exactly known as the material of making strand.In addition, also described in the application and can use polyethylene terephthalate with low coefficient of friction and (little) water absorbing capacity.As if yet this turf is soft relatively, and load being distributed has adverse influence, so produce big relatively normal pressure when the sportsman drops on the turf.Combine with still very important turf-skin friction coefficient, this tends to make between skin and the turf, and skin is worn when sliding-contact takes place.
In International Patent Application WO 99/04074, the polyamide and the polyolefin compound that propose will choose from the group that comprises polypropylene, linear low density polyethylene and polypropylene and poly block copolymer at the silk thread that is used for artificial grass combine.More particularly, described the filament that combination of extrusion goes out, it comprises the exterior layer of core layer or polypropylene, linear low density polyethylene or polypropylene and poly block copolymer, and exterior layer, perhaps the core layer of each polyamide.Also described in this document and used the silk thread that is different from monofilament, preferably, being the fibrillation silk thread of polypropylene and poly block copolymer, the fibrillation silk thread of high density polyethylene (HDPE), the fibrillation silk thread or the polyacrylic fibrillation silk thread of linear low density polyethylene on the one hand, is fibrillation polyamide silk thread on the other hand.Yet the artificial grass that this multifilament is made can not make the friction to human body skin be reduced to enough degree, for example as the football field time.In addition, the recovery effects of high-density polyethylene filaments after big distortion is bad, and be for example pleating in athletic underfooting.
In european patent application 0 417 832, to have described by using the fiber that forms by the film cutting that squeezes out to reduce the mistake fibrillation and relevant wearing and tearing of artificial grass ground cover, it stretches with the ratio that mostly is most 1: 2 to 1: 3.Yet this is to be cost with infringement fibre strength that can realize under higher stretch ratio and hardness, thereby needs many relatively fibrous materials to realize the overall hardness (being the ability of fulcrum ball) of the expectation of artificial turf surface.
Summary of the invention
An object of the present invention is to provide a kind of silk thread that is used for the strand of manufacture of intraocular turf ground cover, it has showed the lower coefficient of friction to human body, thereby even simultaneously enough hard again and have elasticity and showed good hardness and can recover after the distortion of repetition.
According to the present invention,, a kind of silk thread as claimed in claim 1 achieves this end by being provided.Present invention can also be embodied in the artificial grass ground cover as claimed in claim 10, wherein, strand is formed by this silk thread of using according to the sports center of claim 11, this sports ground comprises this artificial ground cover, the present invention and be embodied in the method that is used for making this silk thread according to claim 12.
Have been found that, when with to have the core set of expanded material of better restorability than the high density polyethylene (HDPE) that stretches after large deformation more fashionable, outer layers of high density polyethylene is provided, although stand when being located at the strand bending in the silk thread part of maximum distortion, also can produce following strand, promptly it can not produce significant relatively poor restorability after moderate finite deformation, and this is relevant with the high density polyethylene (HDPE) that stretches usually.Because the coefficient of friction of high density polyethylene (HDPE) and human body skin is low,, avoided relevant with high density polyethylene (HDPE) usually relatively poor restorability after being out of shape so can obtain artificial grass with respect to the low especially friction of human body skin.
In the dependent claims specific embodiment of the present invention is illustrated.
Others of the present invention, effect and details are described in the detailed description of reference accompanying drawing.
Description of drawings
Fig. 1 is the schematic end view according to the cross section of the example of artificial grass sports field of the present invention,
Fig. 2 is the enlarged drawing according to the cross section of the example of monofilament silk thread of the present invention,
Fig. 3 is the signal enlarged drawing according to the cross section of another example of monofilament silk thread of the present invention, and
Fig. 4 is the enlarged perspective according to the sample of the shorter length of another example of monofilament silk thread of the present invention.
The specific embodiment
At first the present invention is described with reference to the currently most preferred embodiment of the present invention.
The sample of artificial sport field shown in Figure 1 comprises above ground portion 1 and covers the artificial grass ground cover 2 on ground.Can be on ground 1 and be covered extra play is set between 2, for example, be used for ground grading uneven, be used for damping and/or be used to absorb moisture.Comprise liner 3 and very near at interval U-shaped bunches 4 according to the artificial grass of this example lining 2, and the flat and crooked arrowband or the strand 5 that form artificial blade of grass.Strand 5 is fixed on the liner that comprises fabric 6 and adhesive layer 7.For example, fabric can for example polypropylene or nylon fiber material be made by weather-proof plastics.
Bunches 4 insert round the fiber that forms substrate or pass fiber, and are kept in position by the sticky material of adhesive layer 7, and fabric 6 and bunches 4 partly embeds in the adhesive layer 7.The end of the strand 5 that protrudes upward from liner 3 for example can be by fibrillation as shown, so that make artificial grass have more smooth outward appearance, softer tactile characteristics and improve its liquid retention characteristic.Can also provide the cross section of moulding further to strengthen smooth outward appearance and soft tactile characteristics.
The height of the pile of measuring from liner 3 (pile) is preferably between 1 and 8 centimetre.If pile is high relatively, can use filler for example sand and/or rubber or other particle come partially filled in pile so that make strand be not easy to be flattened fully be close to pad.Preferably between 0.5 and 20 millimeter, wide relatively strand preferably has the form of band to the width of strand 5, and this band obtains (referring to Fig. 3) by the film with longitudinal fluting and rib.The number of the blade of each bunch 4 is preferably between 1 and 12.The thickness of silk thread preferably approximately is 0.04 to 0.2 millimeter.If bunch make, so in use or as the result of particular processing step, blade just can be split into many blades at an easy rate, until the place of contiguous fabric 6 by the band of moulding with groove 60 and rib 61.For example can obtain meticulous turf like this and only need handle a limited number of band, be one to three or until six bands for each bunch for example.
The silk thread that uses according to the strand 5 of the artificial grass ground cover 2 of example shown in Figure 1 is formed by individual filament 4, this individual filament 4 is cut into or is split into by the band with core layer 8 and two exterior layers 9, and wherein each exterior layer 9 one of two relative sides of being positioned at core layer 8 go up (Fig. 2).The material of exterior layer 9 is different with the material of core layer 8.Core layer 8 comprises polyester or polyolefine material at least, and each exterior layer 9 all comprises high density polyethylene (HDPE) (HDPE).Because silk thread is a monofilament structure, so just do not need to twine silk thread, and just do not have the possibility of the accelerated wear test that causes because untiing strand when making strand.
Manufacturing comprises according to the silk thread of this example and squeezes out core layer 8 and exterior layer 9 and make these layers formation sandwich construction that wherein core layer 8 is between two described exterior layers 9.Preferably carry out the extruding of layer 8,9 simultaneously by these layers of combination of extrusion.
If athletic skin slips on according to the artificial grass of this example lining 2, so in fact skin only with the outside of band shape strand 5 on the HDPE material come in contact.Have low-down coefficient of friction between HDPE and the human skin material, like this, just reduced the risk of injured and significant skin calcination relatively.Although in the exterior layer of band shape filament material, used the HDPE that stretches, and this material is the restorability relative mistake after big distortion, but the artificial grass that has as the silk thread that proposed shown and the similar restorability of the silk thread that is formed separately by core material, and no matter HDPE is arranged in material middle distance neutral conductor part farthest in the BENDING PROCESS of strand 5.
In addition, improved the durability of artificial grass, because the HDPE layer has suppressed the material tendency of fibrillation in use.
Core layer preferably contains mixture, polypropylene and poly block copolymer or the linea low density polypropylene or the polyethylene terephthalate of polypropylene, polypropylene and rubber.Therefore, can obtain good adhesion at each interlayer, this is also very favourable to the auxiliary recovery of HDPE exterior layer after big distortion.This helps to offset the permanent deformation of strand.
If the gross thickness of exterior layer mostly be most multilayer material thickness 50% and preferably mostly be most 15 to 25%, also can help strand 5 and recover shape well.Even exterior layer generation permanent deformation, influence to the overall shape of strand also remains relatively limited, in case because permanent deformation has taken place exterior layer 9, exterior layer 9 is thin more so, core layer 8 just further pushes back strand 5 at least the initial position near it.Therefore also advantageously the thickness of each exterior layer less than 50 microns and preferably less than 20 microns.In addition, the minimum overall thickness of silk thread is at least 100 microns to help holding thick relatively core layer.
Be stretched with 1: 6 stretch ratio along the longitudinal direction according to the material of this example.By preferably stretching with the stretch ratio that was at least 1: 3 to 1: 4, can increase the tensile strength of material, and increase the bending load of material thus, permanent deformation can take place at this bending load place material.In addition, core material for example polypropylene after stretching, tended to mistake fibrillation too easily.HDPE exterior layer protection silk thread is not subjected to thisly to cross fibrillation, so as can to apply stretch and can not exist known increase the shortcoming of fibrillation.
Be used to form multi cord bunches 54 with 54 diagram as shown in Figure 3, wherein the HDPE exterior layer is interrupted by groove 60.In fact usually have shape Paint Gloss with 54 on each of its two relative sides, have parallel, longitudinally, the rib 61 that replaces and the pattern of groove 60.Squeeze out with the groove in 54 the side 60 each all with the groove 60 in another relative side of 54 at diametrically opposite.
What have groove 60 in the surface is with 54 preferably to be formed by the film cutting, this film is squeezed out from the mould of the lip that has moulding in both sides, these protrusions that are used to form groove 60 have the height of the width that is preferably greater than them, the height of these protrusions preferably is at least their 1.5 times of width, more preferably be approximately 2 times, this width each protrude outreach half place record.
Groove 60 forms the interruption that boundary belt 54 prevented the HDPE layer 59 of fibrillation.In order to be used for artificial ground cover, preferably on both sides, have rib 61 and groove 60 pattern provide following advantage with 54, promptly be with 54 can rive randomly to a certain extent by splitting 62 as shown at an easy rate or mistake fibrillation, this helps forming the outward appearance of nature, but only or mainly along groove 60 determined lines, therefore, prevented to a great extent to reduce the lawn overall resiliency cross fibrillation at random.Splitting in the band of moulding usually than the band of the film acquisition by not moulding and the splitting in the silk thread more closely along the webbing between the fibrous body (web).Similarly, in such band, promptly have opposed fully on the contrary each other groove 60 in Dai the relative side, the frequency that splitting process fibrous body is propagated is often less than the splitting that is obtained by film in silk thread or the band, this film is moulding on a side only, thereby has improved the durability of artificial grass.Avoid the local interruption effect of the splitting that formed by groove can to realize by exterior layer and the core layer that is formed by other material, wherein exterior layer protection core layer can splitting yet.
In the band according to this example, groove 60 also extends certain distance in core layer 58.This also provides other support for the splitting guide effect of groove 60.
To longitudinally be split into plurality of fibers or organize fiber more by the band that film 54 obtains, can be for example undertaken by the load that makes band bear shear-type load and/or to have a cross stream component.Can carry out the splitting of this mode by simple mode, for example by provide smooth or along with the tapered continuous roller of the direction of axial opposed, describedly be with 54 on described rod, to lead.Horizontal tensile stress for example can produce by roller is provided, wherein the circumferential surface of these rollers vertically cross section have the shape of shark tooth or ripple.The effect that makes film that such cutting forms or band be subjected to shear-type load or have a tensile load of cross stream component can be undertaken by being wound in the silk thread that twines in (twinning station) (not shown) of station with shape film section equally.
Specific advantage be this bunch can be at first do not rive or only partly rive, and this can make during the manufacturing of film and/or with film band during take place.Next this allow to make the ground cover with following bunch again, a very limited strand of each material that all comprises bunch of these bunches or even a strand, this is convenient to produce.In the processing procedure of band, and/or in use, by this high speed cleaning or combing are carried out special post processing, bunch material can be split into a plurality of more as the strand of careless shape.This can produce following structure, and promptly band will can not rived or rive seldom in the zone of fabric 6 (Fig. 1), and it is more to rive in distance fabric 6 farther places, and wherein band is fixed on the fabric 6.
The bottom section of groove 60 comprises sharp-pointed relatively internal edge, and the film 54 shown in this feature can improve significantly is along the accurate splitting of the webbing that is formed by relative paired groove 60.The stress that these sharp-pointed internal edges have increased in the webbing that forms by relative paired groove 60 is concentrated.In addition, core layer 58 is preferred by forming than exterior layer 59 easier materials of riving.
In Fig. 4, have flattened cross-sectional and be shown to have core layer 28 and exterior layer 29,39 by the silk thread that band obtains.Exterior layer 29 on silk thread one side has the color of the exterior layer 39 that is different from the silk thread opposite side.By the strand of flat silk thread is provided to artificial grass, wherein the color of silk thread one side and/or color harmony opposite side difference can obtain the very attractive artificial grass of outward appearance.If comprising, silk thread is different from top other material that is proposed, even and silk thread comprises two-layer or the single structure layer, also can obtain this effect.In the embodiment of back, need apply color at least one side of silk thread.

Claims (15)

1. a silk thread that is used for the strand of artificial grass ground cover comprises having core layer (8; 58) and two exterior layers (9; 59) band shape filament (4; 54), the material of two exterior layers and core layer (8; 58) material different and with core layer (8; 58) combination of extrusion goes out, and each exterior layer is in core layer (8; 58) on one of two relative sides,
Core layer (8; 58) comprise polyester and/or polyolefine material, and
Exterior layer (9; 59) comprise high density polyethylene (HDPE).
2. silk thread as claimed in claim 1 is characterized in that, core layer (8; 58) comprise polyethylene terephthalate or from the polyolefine material in polyacrylic group of the mixture that comprises polypropylene, polypropylene and rubber, polypropylene and poly block copolymer and the linea low density.
3. as claim 1 or 2 described silk threads, it is characterized in that exterior layer (9; 59) gross thickness mostly be most silk thread thickness 50%.
4. as each described silk thread in the above-mentioned claim, it is characterized in that each exterior layer (9; 59) thickness is less than 50 microns and preferably less than 20 microns.
5. as each described silk thread in the above-mentioned claim, it is characterized in that described material stretches along the longitudinal direction with the stretch ratio that was at least 1: 3.
6. as each described silk thread in the above-mentioned claim, it is characterized in that silk thread is the monofilament band structure.
7. as each described silk thread in the above-mentioned claim, it is characterized in that, be with shape filament (54) to comprise and extend through a plurality of grooves (60) of at least one exterior layer (59) to the longitudinal extension of core layer (58).
8. silk thread as claimed in claim 7 is characterized in that, groove is arranged to opposed fully on the contrary each other in couples in the relative side of band shape filament (54).
9. as claim 7 or 8 described silk threads, it is characterized in that groove (60) has the bottom in core layer of extending to (59),
Core layer (8; 58) comprise polyester or polyolefine material at least, and
Exterior layer (9; 59) comprise high density polyethylene (HDPE).
10. artificial grass ground cover, the strand (5) that comprises underboarding (3) and be fixed to underboarding (3) and protrude upward from underboarding (3), wherein, strand (5) by as above-mentioned claim in each described silk thread form.
11. ground cover as claimed in claim 10, it is characterized in that, the strand bundle be split be separated into as among the claim 7-9 each described at least one the band shape filament (54) a plurality of parts as described in the common band shape filament of part from the zone that strand is fixed partly stretch out.
12. a sports ground comprises the artificial grass ground cover (2) of ground floor (1) and mulched ground surface layer as claimed in claim 10 (1).
13. a method that is used to produce the silk thread of the strand that forms the artificial grass ground cover comprises
Squeeze out the core layer (8 that forms by polyester or polyolefine material at least; 58), and
Squeeze out the exterior layer (9 that comprises high density polyethylene (HDPE); 59) and
Make described layer (8,9) form sandwich construction, wherein core layer (8; 58) be positioned at described two exterior layers (9; 59) between.
14. method as claimed in claim 13 is characterized in that, described core layer (8; 58) and described exterior layer (9; 59) extruding and make described layer (8,9) form described structure to go out described layer (8,9) by combination of extrusion and carry out simultaneously.
15., it is characterized in that described material stretches along the longitudinal direction with the stretch ratio that was at least 1: 3 as claim 13 or 14 described methods.
CNA038268604A 2003-05-28 2003-05-28 Yarn for artificial turf ground cover, artificial turf ground cover and playing field including such a yarn and method for producing it Pending CN1820095A (en)

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